Part of the second shipment to England in 1941 as part of the
lend lease programme, it has the US Army property stampings
on the receiver and barrel.
On the left side of the barrel just under the rear sight is the BNP
stamps.

This particular example is missing the sling and detachable
sling swivels, the rear peep sight, dust cover and the safety
indicator buttons at the rear of receiver.

The previous owner decided that the original finish was no
longer desirable so they slapped on some varnish.
I assume this is when some of the parts may have walked.